Floor system with steel joists having openings with edge...

E - Fixed Constructions – 04 – C

Patent

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E04C 3/08 (2006.01) B21D 53/00 (2006.01) E04B 5/10 (2006.01)

Patent

CA 2491194

A composite steel joist member made up of two steel joists each having a web defining side edges and an axis, a flange on at least one side edge, openings through said web at spaced intervals therealong, having rounded ends and parallel linear sides, portions of said web displaced from said opening remaining attached integrally to the web by bend lines formed on the linear sides of the opening along axes parallel to the web axis, and forming reinforcing channels alongside the opposite sides of the opening, with the joists being joined together back to back with their openings in registration. Also disclosed is a rim member for supporting the composite joists to form a floor structure .

Poutrelle en acier composite faite de deux poutrelles, chacune dotée d'une âme définissant les bords latéraux et un axe, d'une semelle sur au moins un bord latéral et d'ouvertures qui traversent l'âme à des intervalles précis, et dont les extrémités sont arrondies et les côtés linéaires parallèles. Des parties de l'âme sont décalées par rapport aux ouvertures et restent fixées intégralement à l'âme par des lignes de pli formées sur les côtés linéaires des ouvertures le long d'axes parallèles à l'axe de l'âme et forment des canaux de renfort le long des côtés opposés des ouvertures. Les poutrelles sont jointes dos à dos, leurs ouvertures étant alignées. L'invention concerne aussi un bord replié servant à supporter les poutrelles composites pour former la structure d'un plancher.

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